A regulating valve using a bellows sealing structure suitable for metallic sodium medium

Abstract

The utility model discloses a regulating valve using a bellows sealing structure suitable for metallic sodium medium, specifically relates to the technical field of regulating valves, including a valve body, a gasket is arranged on the top of the valve body, a plurality of upper cover bolts are arranged on the top of the valve body, upper cover nuts are arranged on the top of the plurality of upper cover bolts, an integral valve core is arranged on the top of the valve body, a bellows is sleeved on the outer side of the integral valve core, and a middle pipe is arranged on the outer side of the bellows. The utility model has a simple structure by providing a gasket, a bellows and a lower gasket, a packing layer, a packing pressure pad and a packing pressure plate, and a bellows is arranged at the integral valve core for sealing, which effectively prevents the leakage of the fluid medium and improves the safety of use. At the same time, the bellows itself can be extended and retracted in the length direction without affecting the normal opening and closing of the valve. The gasket is used at the middle pipe and the valve body, which can not only ensure the sealing, but also can be cleaned after the valve core and valve seat are blocked and disassembled.

Description

Technical Field

[0001] The utility model relates to the technical field of regulating valves, and more specifically to a regulating valve using a bellows sealing structure suitable for a metallic sodium medium. Background Art

[0002] A regulating valve, also known as a control valve, is a final control element in the field of industrial automation process control that receives control signals output by a regulating control unit and uses power to change process parameters such as medium flow, pressure, temperature, and liquid level. It is generally composed of an actuator and a valve, in which the valve is a control component in a fluid delivery system and has functions such as diversion, interception, regulation, throttling, backflow prevention, diversion, or overflow pressure relief. When a current regulating valve is used to control some highly toxic, volatile, leaky, flammable and explosive media, the seal of the valve stem will cause wear of the packing due to long-term and high-frequency action, causing the valve to leak out, resulting in unpredictable consequences. If the valve leakage is eliminated by simply increasing the number of packings or increasing the packing clamping force, the operating force of the valve stem will increase, and the action will not be sensitive enough to affect the adjustment accuracy. In addition, metallic sodium has strong permeability and high viscosity, and small-diameter valves will become stuck after a long period of use.

[0003] Therefore, there is an urgent need for a regulating valve using a bellows sealing structure suitable for metallic sodium media to solve the above problems. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, an embodiment of the utility model provides a regulating valve using a bellows sealing structure suitable for metallic sodium media. By providing a gasket, a bellows and a lower gasket, a packing layer, a packing pressure pad and a packing pressure plate, the utility model has a simple structure. A bellows is arranged at the integral valve core for sealing, which effectively prevents the leakage of the fluid medium and improves the safety of use. At the same time, the bellows itself can be expanded and contracted in the length direction without affecting the normal opening and closing of the valve. Gaskets are used at the middle pipe and the valve body, which can not only ensure sealing, but also can be cleaned after the valve core and valve seat are blocked, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a regulating valve using a bellows sealing structure suitable for a metallic sodium medium, comprising a valve body, a gasket is arranged on the top of the valve body, a plurality of upper cover bolts are arranged on the top of the valve body, upper cover nuts are arranged on the tops of the plurality of upper cover bolts, an integral valve core is arranged on the top of the valve body, a bellows is sleeved on the outer side of the integral valve core, a middle pipe is arranged on the outer side of the bellows, an upper cover is arranged on the top of the middle pipe, a through hole is penetrated on the upper cover, and a A lower gasket, a packing layer is arranged on the top of the lower gasket, a packing pressure pad is arranged on the top of the packing layer, a packing pressure plate is arranged on the top of the packing pressure pad, a plurality of pressure plate bolts are arranged through the top of the packing pressure plate, and pressure plate nuts are arranged on the tops of the plurality of pressure plate bolts. A rod sleeve is sleeved on the bottom of the integral valve core, the top of the rod sleeve is arranged inside the bellows, a flange ring is arranged on the outer surface of the portion of the rod sleeve located inside the bellows, the outer wall of the flange ring is tightly attached to the inner wall of the bellows, and a pressure relief hole is arranged at the bottom of the middle connecting pipe, and the pressure relief hole is connected to the valve body.

[0006] In a preferred embodiment, the upper cover nut is threadedly connected to an upper cover bolt at a corresponding position, and the upper cover bolt is fixedly installed on the top of the valve body.

[0007] In a preferred embodiment, the pressure plate nut is threadedly connected to a pressure plate bolt at a corresponding position, and the pressure plate bolt is fixedly installed on the top of the upper cover.

[0008] In a preferred embodiment, the integral valve core passes through the through hole on the upper cover and extends to the top of the upper cover.

[0009] In a preferred embodiment, the top end of the bellows is bonded to the edge of the through hole on the upper cover.

[0010] In a preferred embodiment, the bottom end of the bellows is bonded to the outer wall of the bottom of the integral valve core.

[0011] Technical effects and advantages of the utility model:

[0012] The utility model has a simple structure by providing a gasket, a bellows and a lower gasket, a packing layer, a packing pressure pad and a packing pressure plate. The bellows is arranged at the overall valve core for sealing, which effectively prevents leakage of the fluid medium and improves the safety of use. At the same time, the bellows itself can be expanded and contracted in the length direction without affecting the normal opening and closing of the valve. The gasket is used at the middle pipe and the valve body, which can not only ensure sealing, but also can be cleaned after disassembly when the valve core and valve seat are blocked. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0014] The accompanying drawings are marked as follows: 1. valve body; 2. gasket; 3. upper cover bolt; 4. upper cover nut; 5. integral valve core; 6. bellows; 7. middle pipe; 8. upper cover; 9. lower liner; 10. packing layer; 11. packing pressure pad; 12. packing pressure plate; 13. pressure plate bolt; 14. pressure plate nut. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] As attached Figure 1 As shown, the utility model provides a regulating valve using a bellows sealing structure suitable for a metallic sodium medium, comprising a valve body 1, a gasket 2 is arranged on the top of the valve body 1, a plurality of upper cover bolts 3 are arranged on the top of the valve body 1, upper cover nuts 4 are arranged on the tops of the plurality of upper cover bolts 3, an integral valve core 5 is arranged on the top of the valve body 1, a bellows 6 is sleeved on the outer side of the integral valve core 5, a middle pipe 7 is arranged on the outer side of the bellows 6, an upper cover 8 is arranged on the top of the middle pipe 7, a through hole is penetrated on the upper cover 8, a lower liner 9 is arranged inside the upper cover 8, and the lower liner A packing layer 10 is arranged on the top of 9, a packing pressure pad 11 is arranged on the top of the packing layer 10, a packing pressure plate 12 is arranged on the top of the packing pressure pad 11, a plurality of pressure plate bolts 13 are arranged through the top of the packing pressure plate 12, and pressure plate nuts 14 are arranged on the tops of the plurality of pressure plate bolts 13. A rod sleeve is sleeved on the bottom of the integral valve core 5, the top of the rod sleeve is arranged inside the bellows 6, a flange ring is arranged on the outer surface of the part of the rod sleeve located in the bellows 6, the outer wall of the flange ring is tightly attached to the inner wall of the bellows 6, a pressure relief hole is arranged at the bottom of the middle pipe 7, and the pressure relief hole is communicated with the valve body 1.

[0017] The upper cover nut 4 is threadedly connected with the upper cover bolt at the corresponding position, and the upper cover bolt 3 is fixedly installed on the top of the valve body 1.

[0018] The pressure plate nut 14 is threadedly connected to the pressure plate bolt 13 at the corresponding position, and the pressure plate bolt 13 is fixedly installed on the top of the upper cover 8.

[0019] The integral valve core 5 passes through the through hole on the upper cover 8 and extends to the top of the upper cover 8 .

[0020] The top end of the bellows 6 is bonded to the edge of the through hole on the upper cover 8 .

[0021] The bottom end of the bellows 6 is bonded to the outer wall of the bottom of the integral valve core 5 .

[0022] The specific implementation method is as follows: when the utility model is used, since the top end of the bellows 6 is bonded to the edge of the through hole on the upper cover 8, and the bottom end of the bellows 6 is bonded to the outer wall of the bottom of the integral valve core 5, and the outer wall of the flange ring is close to the inner wall of the bellows 6 to form a sealed connection, the pressure of the fluid medium entering the middle pipe 7 will act on the flange ring, reducing the impact on the sealed connection and improving the service life. A pressure relief hole is provided at the bottom of the middle pipe 7, and the pressure relief hole is connected to the valve body 1, that is, connected to the inner cavity of the valve body 1. During use, the fluid medium will enter the middle pipe 7 through the gap between the integral valve core 5 and the bottom of the middle pipe 7, causing the pressure in the middle pipe 7 to increase, which is easy to affect the various sealed connections in the middle pipe 7, and the pressure relief hole directly connects the middle pipe 7 with the chamber in the valve body 1, balances the pressure between them, achieves the purpose of pressure relief, and reduces the impact on the seal. The influence of the connection improves the service life. The integral valve core 5 will cause the packing of the packing layer 10 to wear under long-term and high-frequency operation, thereby increasing the gap between the integral valve core 5. Through the adjustment of the pressure plate bolt 13 and the pressure plate nut 14, the packing pressure plate 12 can act on the packing pressure pad 11, so that the packing pressure pad 11 presses the packing, reduces the gap between the packing and the valve stem, improves the sealing of the packing to the valve stem, and further improves the safety of use. This makes the structure of the utility model simple. A bellows 6 is set at the integral valve core 5 for sealing, which effectively prevents the leakage of the fluid medium and improves the safety of use. At the same time, the bellows 6 itself can be expanded and contracted in the length direction without affecting the normal opening and closing of the valve. Gaskets are used at the middle pipe 7 and the valve body 1, which can not only ensure sealing, but also can be disassembled and cleaned after the valve core and valve seat are blocked.

[0023] Working principle of this utility model:

[0024] Refer to the instruction manual Figure 1 When using the utility model, the gasket 2, the bellows 6 and the lower liner 9, the packing layer 10, the packing pressure pad 11 and the packing pressure plate 12 are provided, so that the utility model has a simple structure. The bellows 6 is provided at the integral valve core 5 for sealing, which effectively prevents the leakage of the fluid medium and improves the safety of use. At the same time, the bellows 6 itself can be expanded and contracted in the length direction without affecting the normal opening and closing of the valve. The gasket is used at the middle pipe 7 and the valve body 1, which can not only ensure the sealing, but also can be cleaned after the valve core and valve seat are blocked and disassembled.

[0025] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0026] Secondly: In the drawings of the embodiments disclosed in the present utility model, only the structures related to the embodiments disclosed in the present utility model are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present utility model can be combined with each other;

[0027] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A regulating valve using a bellows sealing structure suitable for a metallic sodium medium, comprising a valve body (1), characterized in that: A gasket (2) is arranged on the top of the valve body (1), a plurality of upper cover bolts (3) are arranged on the top of the valve body (1), and upper cover nuts (4) are arranged on the top of the plurality of upper cover bolts (3). An integral valve core (5) is arranged on the top of the valve body (1), a bellows (6) is sleeved on the outer side of the integral valve core (5), a middle pipe (7) is arranged on the outer side of the bellows (6), an upper cover (8) is arranged on the top of the middle pipe (7), a through hole is penetrated through the upper cover (8), a lower liner (9) is arranged inside the upper cover (8), a packing layer (10) is arranged on the top of the lower liner (9), and the packing layer (10) A packing pressure pad (11) is arranged at the top, a packing pressure plate (12) is arranged at the top of the packing pressure pad (11), a plurality of pressure plate bolts (13) are arranged through the top of the packing pressure plate (12), a plurality of pressure plate nuts (14) are arranged at the top of the pressure plate bolts (13), a rod sleeve is arranged at the bottom of the integral valve core (5), the top of the rod sleeve is arranged inside the bellows (6), a flange ring is arranged on the outer surface of the rod sleeve located inside the bellows (6), the outer wall of the flange ring is tightly attached to the inner wall of the bellows (6), a pressure relief hole is arranged at the bottom of the middle pipe (7), and the pressure relief hole is connected to the valve body (1).

2. The regulating valve using a bellows sealing structure suitable for metallic sodium medium according to claim 1, characterized in that: The upper cover nut (4) is threadedly connected to the upper cover bolt at the corresponding position, and the upper cover bolt (3) is fixedly installed on the top of the valve body (1).

3. The regulating valve using a bellows sealing structure suitable for metallic sodium medium according to claim 1, characterized in that: The pressure plate nut (14) is threadedly connected to the pressure plate bolt (13) at the corresponding position, and the pressure plate bolt (13) is fixedly installed on the top of the upper cover (8).

4. The regulating valve using a bellows sealing structure suitable for metallic sodium medium according to claim 1, characterized in that: The integral valve core (5) passes through the through hole on the upper cover (8) and extends to the top of the upper cover (8).

5. The regulating valve using a bellows sealing structure suitable for metallic sodium medium according to claim 1, characterized in that: The top end of the corrugated tube (6) is bonded to the edge of the through hole on the upper cover (8).

6. The regulating valve using a bellows sealing structure suitable for metallic sodium medium according to claim 1, characterized in that: The bottom end of the bellows (6) is bonded to the outer wall of the bottom of the integral valve core (5).

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